/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.imagelettericon.util;

/**
 * TextUtils
 *
 * @since 2021-06-02
 */
public class TextUtils {
    private TextUtils() {
    }

    /**
     * Compute Text
     *
     * @param str String
     * @param letterCount 字母个数
     *
     * @return String
     */
    public static String computeText(String str, int letterCount) {
        if (str == null || str.length() == 0) {
            return "";
        }
        String[] initials = str.split("\\s+");
        StringBuilder initialsPlain = new StringBuilder(letterCount);
        for (String initial : initials) {
            initialsPlain.append(initial.substring(0, 1));
        }
        String subText = initialsPlain.toString();
        return subText.substring(0, letterCount > subText.length() ? subText.length() : letterCount);
    }
}
